Multi-unit charger



FIG. 1 is a front, top and left side perspective view of a multi-unit charger showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is back view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a left view thereof; and,

FIG. 7 is a right view thereof.

The broken lines shown in FIGS. 1-7 are included for the purpose of illustrating environmental elements only and form no part of the claimed design. 

The ornamental design for a multi-unit charger, as shown and described. 